ABSTRACT
Objective To establish the HPLC fingerprints for the guality control of ascidian Styela plicata.Methods The HPLC fingerprints of ten batches of samples were obtained using ZORBAX Bonus-RP(4.6?250mm,5?m) column with a mix of acetonitrile and water with 0.01%TFA as mobile phase in a gradient mode,the detection wavelength was 254nm and the temperature was 30℃.Results The experiment and analysis were carried out on ten samples,the standard HPLC fingerprint pattern method and 13 characteristic diffraction peaks of Styela plicata were obtained.The proposed method was precise,reproducible and steady.Conclusion This reliable and convenient method can be used for the identification and quality control of Styela plicata.
ABSTRACT
Aim To study the anti-HBV effect of alcohol extract from styela plicata Lesueur,styela canopus Savigny and symplegma oceania Tokioka in vitro and estimate their function.Methods An assay system based on the sera of HBV infection and HBV clearance was used to assess their inhibitory effects on HBsAg,HBeAg,anti-HBs and anti-HBe.Results Alcohol extract from the three species of ascidians all had a definite inhibition effect on HBsAg when the concentration was over 2 g?L -1 and a favorable inhibition effect on HBeAg when the concentration was over 0.5 g?L -1.There was no significant difference in inhibiting the two kinds of antigen.Conclusion Alcohol extract from the three species of ascidians all had the definite inhibition effects on HBsAg and HBeAg from serum of Hepatitis B patients.The inhibition effects were dose-dependent. From the effcets of alcohol extract on anti-HBs and anti-HBe,we can estimate that there are about two kinds of anti-HBV compositions.One has the similar structure with the antibody,which can exterminate the HBV by the way of forming a uninfectious combination with the antigen. The other has a definite inhibition effect on the antigen,and also has some inhibition effect on the antibody.